Temperature dependence (13–600 K) of Mn4+ lifetime in commercial Mg28Ge7.55O32F15.04 and K2SiF6 phosphors
作者： W.W. Beers , D. Smith , W.E. Cohen , A.M. Srivastava
DOI: 10.1016/J.OPTMAT.2018.07.050
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摘要: Abstract The fluorescence lifetime of the Mn4+ 2Eg→4A2g transition in commercial Mg28Ge7.55O32F15.04 (MFG) and K2SiF6 (KSF) phosphors are measured temperature region 13–600 K. In MFG, observed decrease with increasing is correlated probability phonon induced transitions (vibronic emission) without any contribution nonradiative transitions. KSF, 13–500 K associated an increase vibronic probability. Above 500 K, rapid onset non-radiative relaxation. differences between thermal quenching behavior luminescence two explained respect to energy position 4T2g state.
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